The son of the Saudi Arabian journalist who was allegedly murdered in the Middle Eastern kingdom's consulate in Istanbul at the start of the month has left the country along with his family, Human Rights Watch (HRW) told Efe on Thursday.

The director of the Middle East and North Africa division of HRW, Sarah Leah Whitson, confirmed the news of Salah's departure to Efe, adding that he was heading to the United States after the Saudi authorities had lifted his travel ban.

In the photos released by the Saudi state-run SPA news agency, Salah appeared to show discomfort while shaking hands with the King and Crown Prince, prompting a wide spectrum of comments from around the world.

Salah's departure came hours after the public prosecutor's office admitted, based on a report from Turkey, that the killing of Khashoggi had been planned in advance, adding that those responsible for the crime would be punished.

Initially, Saudi Arabia stated that Khashoggi left its consulate alive on Oct. 2, but nearly three weeks later, the Arab kingdom admitted he had been killed at the diplomatic mission's building due to a fight, an account about which several governments have expressed scepticism.

Later, the Saudi prosecutor's office announced that 18 people had been arrested and that the security officials involved in the case had stepped down.

Turkey said it believed a hit squad of Saudi nationals had travelled to Istanbul with the sole purpose of killing Khashoggi, a former member of the Saudi elite who became critical of the current government's administration in his country.

Case History:

According to the daily, Khashoggi came under attack within two minutes of entering the consulate on October 2 and was dead within seven minutes. He was dismembered in 22 minutes.

On Saturday, Saudi Arabia's rulers admitted for the first time that their agents had killed Khashoggi. They said he was accidentally strangled during a brawl that broke out in the consulate as the Saudi agents tried to persuade him to return to the kingdom.

The Saudi officials have also said that Crown Prince Mohammed bin Salman, the 33-year-old de facto ruler of the kingdom, had no knowledge of the mission and that he learned of the killing only two weeks later. But this theory is widely challenged.

The Times quoted a source as saying that Khashoggi's body was rolled into a rug before handing it over.